For radio, nearly 90% of listening hours are delivered through FM, AM, and digital (DAB), equating to 900 million hours of radio each week in round numbers; a staggering figure. It's the same for TV; some 98% of viewing is to live or time-shifted programmes which were delivered to the home on satellite, cable, or Freeview.

So I am making the point that we have to balance our critical investment in the future with investment in broadcast platforms, in order that they are worthy as the nation's favourite places to watch and listen to our services.

You might be wondering what this means for BBC Local Radio or our radio services for the Nations. Not a lot, I'm sorry to say. As you might know, our Local Radio services and our radio services for the Nations are carried in capacity which we buy from a commercial multiplex operator in each area. The expansion of the commercial multiplexes is tied up with the Government's digital radio action plan. There is extensive work going on across the industry on that front and we expect some more news at the end of this year. So, for now at least, this phase of network expansion covers only the BBC's UK-wide services.

The locations are listed as

BBC DAB Phase 4 by area, number of transmitters in parentheses, including principal towns/villages

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